...comment NISKAYUNA, N.Y.--General Electric unveiled a project at its research labs that will let homeowners cut annualenergy consumption to zero by 2015. These "net-zero energy homes" will combine on-site power generation through...
http://news.cnet.com/8301-11128_3-10286278-54.html
...million watthours), or gigawatt-hours (GWh, which is one billion, or 109, watt-hours). For national or world annualenergy consumption, the unit of Terawatt-hours is the most convenient (TWh, which is one trillion, or 1012, watt...
http://whitepaper.ises.org/ISES-WP-72.pdf